Real-time positions and pass predictions for the satellites you can actually talk to — amateur-radio birds and the ISS — propagated live with SGP4. Pointing is only as good as the elements' age, shown below.
| Select a satellite to predict passes. |
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Positions come from publicly published orbital elements (TLEs) propagated with the standard SGP4 model. Fresh elements (under a few days old) give pointing good to a fraction of a degree; the TLE age readout warns you when they're getting stale. This tracker is scoped to communicable satellites — amateur transponders and the ISS — not the full 19,000-object catalog, by design.